better error message to ask for a new line at the end
the code MUST have a blank line at the end, it there isn't one an ugly error message is shown ("Line 6: Parse error on line 6: ... %eaxisubl -5, %eax ----------------------^ Expecting 'NEW_LINE', 'COMMA', 'COMMENT', got 'EOF'"). It would be better to have something clearer for the students.